Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 207

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9 MILLING TECHNICAL INFO Nomenclature A B A Shank B Helix Angle F C Flute D Outside Diameter (DC) E Cutting Length (AP) F Overall Length (OAL) C E D 1 2 6 1 Gash 3 8 2 Primary Relief Angle 7 3 Secondary Relief Angle 4 Heel 2 5 Cutting Edge 3 6 Rake Angle 5 9 7 Width of Primary Relief Land 4 8 Width of Secondary Relief Land 9 Undercut Face Features Of The End Mill - Choosing The Number Of Flutes (NOF) Number of flutes should be determined by: • Milled material • Dimension of workpiece • Milling conditions 2 Flutes 3 Flutes 4 Flutes (or multi-flutes) LOW DEFLECTION STRENGTH HIGH BIG CHIP SPACE SMALL • Large chip space. • Chip space almost as large as for 2 flutes. • Highest rigidity. • Easy chip ejection. • Larger section area - higher rigidity than 2 flutes • Largest section area – small chip space. • Good for slot milling. • Improved surface finish • Gives best surface finish. • Good for heavy duty milling. • Recommended for profiling, side milling and shallow • Less rigidity due to small section area. slotting. • Lower quality surface finish 206